import java.util.Date;

public class Data {
    public int year;
    public int month;
    public int day;
    public void setDay(int year,int month,int day){
        this.year = year;
        this.month = month;
        this.day = day;
    }
    public void printData(){
        System.out.println(year+"/"+month+"/"+day);
    }
    public static void main(String[] args){
        Data d1 = new Data();
        Data d2 = new Data();
        Data d3 = new Data();
        d1.setDay(2020,9,15);
        d2.setDay(2020,9,16);
        d3.setDay(2020,9,17);
        d1.printData();
        d2.printData();
        d3.printData();
    }
}
